Anomalous slowing down of the vibrational relaxation of liquid water upon nanoscale confinement
We study the vibrational dynamics of nanodroplets of liquid water with femtosecond two-color midinfrared pump-probe spectroscopy. For the smallest nanodroplet, containing 10-15 water molecules, the lifetime T1 of the O-H stretch vibrations is equal to 0.85+/-0.1 ps, which is more than 3 times as lon...
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Published in | Physical review letters Vol. 94; no. 17; p. 178301 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
United States
06.05.2005
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Online Access | Get more information |
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Summary: | We study the vibrational dynamics of nanodroplets of liquid water with femtosecond two-color midinfrared pump-probe spectroscopy. For the smallest nanodroplet, containing 10-15 water molecules, the lifetime T1 of the O-H stretch vibrations is equal to 0.85+/-0.1 ps, which is more than 3 times as long as in bulk liquid water. We find that the truncation of the hydrogen-bond network of water leads to a dramatic change of the relaxation mechanism. |
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ISSN: | 0031-9007 |
DOI: | 10.1103/physrevlett.94.178301 |